ROCKLAND, Maine (AP) — A 36-year-old Maine prison inmate is going to serve 40 additional years for kidnapping and assaulting a prison librarian and another inmate.

A judge told Michael Chasse Tuesday his actions were "unspeakably cruel" when he stabbed the librarian and the other inmate while he held them hostage for about seven hours on June 30, 2008 at the Maine State Prison in Warren. The hostages were not seriously hurt.

Chasse was convicted in August. Chasse was originally in prison for breaking into the home of the brother of former Defense Secretary Bill Cohen. Chasse argued he should be sentenced to about 15 years.

The Bangor Daily News says Chasse's latest sentence will not begin until his current sentence has been completed. His release is scheduled for 2070.